I agree with Thunderdrones, it looks like a scam site to me as the Air is far too cheap, some of the GoPros are far too cheap as well, there's a short countdown for the deal (I noticed this countdown style a lot of times on scam sites over Christmas). there's almost no information about the company on their site (I can't see an about or anything else), the visitor numbers/just purchased appears to be generated on the fly, they've incorrectly copy/pasted some parts of the site, they are hiding the domain registration information and the site is a new one.
The Paypal payment part does look genuine so I don't think you need to worry about them harvesting your details and I would agree that you should start the refund process now.
Any time you see a popular product like a DJI drone, Apple, MS Surface, GoPro etc. at a much cheaper price I'd stop and look further into it as a lot of these devices are rarely discounted much even when they're being retired and since they're popular devices, they're popular with the scammers. Even if the products are genuine some are grey imports (a product sold for one region but being sold in another usually bypassing import laws/costs) which may have no warranty or support in your country.
